package org.apache.maven.shared.transfer.artifact.install.internal;
   
   /*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you under the Apache License, Version 2.0 (the
    * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *  http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  
  import java.io.File;
  import java.util.Collection;
  
  import org.apache.maven.artifact.Artifact;
  import org.apache.maven.project.ProjectBuildingRequest;
  import org.apache.maven.shared.transfer.artifact.install.ArtifactInstaller;
  import org.apache.maven.shared.transfer.artifact.install.ArtifactInstallerException;
  import org.apache.maven.shared.transfer.repository.RepositoryManager;
  import org.codehaus.plexus.PlexusConstants;
  import org.codehaus.plexus.PlexusContainer;
  import org.codehaus.plexus.component.annotations.Component;
  import org.codehaus.plexus.component.repository.exception.ComponentLookupException;
  import org.codehaus.plexus.context.Context;
  import org.codehaus.plexus.context.ContextException;
  import org.codehaus.plexus.personality.plexus.lifecycle.phase.Contextualizable;
  
  /**
   * 
   */
  @Component( role = ArtifactInstaller.class )
  class DefaultArtifactInstaller
      implements ArtifactInstaller, Contextualizable
  {
      private PlexusContainer container;
      
      private RepositoryManager repositoryManager;
  
      @Override
      public void install( ProjectBuildingRequest request, Collection<Artifact> mavenArtifacts )
          throws ArtifactInstallerException, IllegalArgumentException
      {
          validateParameters( request, mavenArtifacts );
          try
          {
              getMavenArtifactInstaller( request ).install( mavenArtifacts );
          }
          catch ( ComponentLookupException e )
          {
              throw new ArtifactInstallerException( e.getMessage(), e );
          }
      }
  
      @Override
      public void install( ProjectBuildingRequest request, File localRepositry, Collection<Artifact> mavenArtifacts )
          throws ArtifactInstallerException
      {
          validateParameters( request, mavenArtifacts );
          if ( localRepositry == null )
          {
              throw new IllegalArgumentException( "The parameter localRepository is not allowed to be null." );
          }
          if ( !localRepositry.isDirectory() )
          {
              throw new IllegalArgumentException( "The parameter localRepository must be a directory." );
          }
  
          // TODO: Should we check for exists() ?
          
          // update local repo in request 
          ProjectBuildingRequest newRequest = repositoryManager.setLocalRepositoryBasedir( request, localRepositry );
  
          try
          {
              getMavenArtifactInstaller( newRequest ).install( mavenArtifacts );
          }
          catch ( ComponentLookupException e )
          {
              throw new ArtifactInstallerException( e.getMessage(), e );
          }
      }
  
      private void validateParameters( ProjectBuildingRequest request, Collection<Artifact> mavenArtifacts )
      {
          if ( request == null )
          {
              throw new IllegalArgumentException( "The parameter request is not allowed to be null." );
          }
          if ( mavenArtifacts == null )
         {
             throw new IllegalArgumentException( "The parameter mavenArtifacts is not allowed to be null." );
         }
         if ( mavenArtifacts.isEmpty() )
         {
             throw new IllegalArgumentException( "The collection mavenArtifacts is not allowed to be empty." );
         }
     }
 
     /**
      * @return true if the current Maven version is Maven 3.1.
      */
     private boolean isMaven31()
     {
         return canFindCoreClass( "org.eclipse.aether.artifact.Artifact" ); // Maven 3.1 specific
     }
 
     private boolean canFindCoreClass( String className )
     {
         try
         {
             Thread.currentThread().getContextClassLoader().loadClass( className );
 
             return true;
         }
         catch ( ClassNotFoundException e )
         {
             return false;
         }
     }
 
     /**
      * Injects the Plexus content.
      *
      * @param context Plexus context to inject.
      * @throws ContextException if the PlexusContainer could not be located.
      */
     public void contextualize( Context context )
         throws ContextException
     {
         container = (PlexusContainer) context.get( PlexusConstants.PLEXUS_KEY );
     }
     
     private MavenArtifactInstaller getMavenArtifactInstaller( ProjectBuildingRequest buildingRequest )
         throws ComponentLookupException, ArtifactInstallerException
     {
         if ( isMaven31() )
         {
             org.eclipse.aether.RepositorySystem repositorySystem =
                             container.lookup( org.eclipse.aether.RepositorySystem.class );
             
             org.eclipse.aether.RepositorySystemSession session =
                 (org.eclipse.aether.RepositorySystemSession) Invoker.invoke( buildingRequest, "getRepositorySession" );
 
             return new Maven31ArtifactInstaller( repositorySystem, session );
         }
         else
         {
             org.sonatype.aether.RepositorySystem repositorySystem =
                             container.lookup( org.sonatype.aether.RepositorySystem.class );
             
             org.sonatype.aether.RepositorySystemSession session =
                 (org.sonatype.aether.RepositorySystemSession) Invoker.invoke( buildingRequest, "getRepositorySession" );
 
             return new Maven30ArtifactInstaller( repositorySystem, session );
         }
     }
 }